121452153100 has 72 divisors (see below), whose sum is σ = 279241064928. Its totient is φ = 45692544000.

The previous prime is 121452153023. The next prime is 121452153103. The reversal of 121452153100 is 1351254121.

It is a super-2 number, since 2×121452153100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (121452153103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2599950 + ... + 2646250.

It is an arithmetic number, because the mean of its divisors is an integer number (3878348124).

Almost surely, 2^121452153100 is an apocalyptic number.

121452153100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121452153100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139620532464).

121452153100 is an abundant number, since it is smaller than the sum of its proper divisors (157788911828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121452153100 is a wasteful number, since it uses less digits than its factorization.

121452153100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47875 (or 47868 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

It can be divided in two parts, 1214521 and 53100, that added together give a palindrome (1267621).

The spelling of 121452153100 in words is "one hundred twenty-one billion, four hundred fifty-two million, one hundred fifty-three thousand, one hundred".